<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			
			div{
				width: 123px;
				height: 123px;
				padding: 20px 40px 30px 50px;
				padding: 20px 40px;
				border:1px solid  #000000;
			}
		</style>
	</head>
	<body>
		<!-- div不设置宽高的话，默认的宽度是整个父容器，高度是0 -->
		
		
		
		<div>
			
		</div>
	</body>
</html>
